A clutch device includes a pressure plate movable toward and away from a clutch center to press input-side rotating plates and output-side rotating plates. An oil flow hole is located in a spline groove to penetrate an outer peripheral wall of the clutch center, to enable clutch oil having flowed out of an output shaft to be discharged to outside of the clutch center, and located between an end of a center-side slipper cam surface in a second circumferential direction and a center-side cam hole located ahead, in the first circumferential direction, of the end in the second circumferential direction, in the circumferential directions. A through hole is located ahead, in the first circumferential direction, of the end of the center-side slipper cam surface in the first circumferential to guide clutch oil flowing outside the clutch center to the inside of the clutch center.

A powertrain may include drive gears provided in an input shaft; an output shaft configured such that a differential is connected thereto; a first driven gear and a second driven gear rotatably provided in the output shaft to be engaged with the drive gears to form respective gear stages; a first clutch and a second clutch; two driveshafts provided to output power in opposed directions from the differential; and a third clutch configured to change a connection relationship among a selected driveshaft of the two driveshafts, the second driven gear, and the output shaft by sliding along an axial direction of the input shaft while being connected to the output shaft via the second clutch.

A power transmitting apparatus inputs or cuts off rotational power of an input member (1) to an output member (3) by press-contacting a plurality of driving-side clutch discs (6) and a plurality of driven-side clutch discs (7) with each other or releases them. A clutch housing (2) includes the driving-side clutch discs (6). A clutch member is (4) connected to the output member (3). A pressure member (5) press-contacts the discs (6) and discs (7) with each other or releases the press-contacting force between them. Application of a resisting force, for resisting relative rotation between the clutch member (4) and the pressure member (5), can be attained. A magnitude of the resisting force is set larger than a sticking torque between the discs (6) and discs (7).

A power transmitting apparatus inputs or cuts off rotational power of an input member (1) to an output member (3) by press-contacting a plurality of driving-side clutch discs (6) and a plurality of driven-side clutch discs (7) with each other or releases them. A clutch housing (2) includes the driving-side clutch discs (6). A clutch member is (4) connected to the output member (3). A pressure member (5) press-contacts the discs (6) and discs (7) with each other or releases the press-contacting force between them. Application of a resisting force, for resisting relative rotation between the clutch member (4) and the pressure member (5), can be attained. A magnitude of the resisting force is set larger than a sticking torque between the discs (6) and discs (7).

Power generation systems for aircraft are described. The power generation systems include at least one aircraft component and a ram air turbine assembly configured to provide power to the at least one aircraft component. The ram air turbine assembly includes a turbine, a power generator operably connected to the turbine, and a continuously variable transmission arranged between the turbine and the power generator, the continuously variable transmission configured to receive an input rotational speed from the turbine and output a constant output rotation speed to enable power generation at the power generator.

A powertrain may include drive gears provided in an input shaft; an output shaft configured such that a differential is connected thereto; a first driven gear and a second driven gear rotatably provided in the output shaft to be engaged with the drive gears to form respective gear stages; a first clutch and a second clutch; two driveshafts provided to output power in opposed directions from the differential; and a third clutch configured to change a connection relationship among a selected driveshaft of the two driveshafts, the second driven gear, and the output shaft by sliding along an axial direction of the input shaft while being connected to the output shaft via the second clutch.

A powertrain may include drive gears provided in an input shaft; an output shaft configured such that a differential is connected thereto; a first driven gear and a second driven gear rotatably provided in the output shaft to be engaged with the drive gears to form respective gear stages; a first clutch and a second clutch; two driveshafts provided to output power in opposed directions from the differential; and a third clutch configured to change a connection relationship among a selected driveshaft of the two driveshafts, the second driven gear, and the output shaft by sliding along an axial direction of the input shaft while being connected to the output shaft via the second clutch.

Disclosed herein is a motor including a bearing in which a rolling member is disposed between an inner ring and an outer ring, a spring connected to the outer ring, and a pusher connected to the spring to be retracted to a first position spaced apart from the inner ring by the spring, and to be advanced to a second position at which friction with the inner ring is caused by a pressure of air acting on a pressure surface when the pressure surface on which the pressure of air flowing by the impeller acts is formed, wherein the inner ring is spaced apart from the rotating shaft by a gap formed between the inner ring and the rotating shaft when the pusher is at the second position.

A clutch assembly includes an output shaft extending along an axis and output teeth. A movable component is disposed adjacent to the output component. The movable component includes drive teeth and an annular engagement weight track including a groove circumscribing the axis. The movable component is movable between an engaged position, wherein the drive teeth are drivingly engaged with the output teeth, and a disengaged position, wherein the drive teeth are not engaged with the output teeth. An input component is disposed adjacent to the movable component. The input component includes engagement weight pockets. Spherical engagement weights are disposed in each engagement weight pocket. The groove has a generally uniform radial cross section across its circumference.

A clutch assembly includes an output shaft extending along an axis and output teeth. A movable component is disposed adjacent to the output component. The movable component includes drive teeth and an annular engagement weight track including a groove circumscribing the axis. The movable component is movable between an engaged position, wherein the drive teeth are drivingly engaged with the output teeth, and a disengaged position, wherein the drive teeth are not engaged with the output teeth. An input component is disposed adjacent to the movable component. The input component includes engagement weight pockets. Spherical engagement weights are disposed in each engagement weight pocket. The groove has a generally uniform radial cross section across its circumference.